Seeing the potential for a new human to bring it food, the Gitrog Monster bowled through her besiegers, saving her
Toxrill, the Corrosive Custom MTG Commander Deck
Wistfulness, Vibrance, Emptiness, Deceit, and Catharsis change what they do based on the colors you use to cast them, which makes every decision feel meaningful
It's put into the graveyard from the stack, not the battlefield, so its last ability won't trigger
(Look at the top X cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Once Lydia Frye has been blocked, increasing the blocking creature's power to 3 or greater won't cause Lydia Frye to become unblocked
Along the way, there are plenty of obvious winners: cards that become pro tournament staples, others that skyrocket in price due to rarity and usefulness, and everything in between